Single-Walled Carbon Nanotube Nucleated Solution-Crystallization of Polyethylene
Single-Walled Carbon Nanotube Nucleated Solution-Crystallization of Polyethylene
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DOI：
10.1021/jp074005v
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发表时间：
2007-11
影响因子：
3.7
通讯作者：
H. Uehara;Kaori Kato;Masaki Kakiage;T. Yamanobe;T. Kōmoto
中科院分区：
文献类型：
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作者：
H. Uehara;Kaori Kato;Masaki Kakiage;T. Yamanobe;T. Kōmoto
通过对所得薄膜的形态观察和热分析，研究了聚乙烯（PE）与单壁碳纳米管（SWNT）的溶液结晶。在这项研究中，选择了长链超高分子量 (UHMW) PE 来与 SWNT 进行可能的相互作用。使用的溶剂是二氯苯，它可以将SWNT和UHMW-PE链分散在热溶液中。电子显微镜观察表明，冷却至室温后，形成了由SWNT主链连接的PE单晶片层组成的独特网络形态。对不同 SWNT 浓度所获得的形貌进行比较表明，SWNT 表面充当 UHMW-PE 溶液结晶的核。由 UHMW-PE/SWNT 复合材料聚集体制备的薄膜的熔融行为表明，SWNT 可以防止加热过程中溶液结晶的 PE 片层的厚度加倍，这通常在堆叠单晶中观察到。
Solution crystallization of polyethylene (PE) with single-walled carbon nanotubes (SWNTs) was investigated by morphological observations and thermal analyses of the resultant films. In this study, long chains of ultrahigh-molecular-weight (UHMW) PE were chosen for a possible interaction with SWNTs. The solvent used was dichlorobenzene, which can disperse both SWNTs and UHMW-PE chains in a hot solution. Electron microscopy observation revealed that a unique network morphology composed of PE single-crystalline lamellae connected by SWNT backbones is developed after cooling to room temperature. A comparison of the obtained morphologies for different SWNT concentrations suggested that SWNT surfaces function as nuclei for solution-crystallization of UHMW-PE. The melting behavior of the films prepared from the aggregates of UHMW-PE/SWNT composites indicated that SWNTs prevent the thickness doubling of solution-crystallized PE lamellae during heating, which is usually observed for the stacked single crystals of ...